Sequence Of Operation; Lighting And Shutdown Instructions - Space-Ray ADU25 Installation And Operation Instruction Manual

14.1) SEQUENCE OF OPERATION

The chart below shows the sequence of operation for the normal operating cycle.
Fig. 37
If the flame is not sensed during sequence T3 then the heater will go to lockout.
It is essential that all new pipework installations are purged and tested for soundness with a suitable leak
detection fluid prior to attempting to ignite any appliance. This work should be carried out in accordance with
National or Local regulations.
NOTE: DO NOT TEST FOR SOUNDNESS BY USE OF NAKED FLAMES.

14.2) LIGHTING AND SHUTDOWN INSTRUCTIONS

Ensure that the Control Box lid is closed and secured with the two toggle latches. The heater will not operate
a.
with the door open.
Turn on the gas supply to the appliance.
b.
Set any time switches or thermostats to demand heat.
c.
Switch on the electricity supply to the appliance. The red neon indicator will be illuminated.
d.
The burner should ignite within 30 seconds. Both red and amber neon indicators will remain illuminated.
e.
Failure to ignite will result in the ignition controller going to "lockout" condition. The red neon indicator will
f.
remain illuminated. The amber neon indicator will be extinguished.
If lockout occurs, switch off the electricity supply to the appliance; wait for 15 seconds before switching on
g.
the electricity supply to the appliance to repeat the ignition sequence.
If the appliance fails to ignite after a second sequence switch off the electrical supply to the appliance and
h.
call the service engineer.
If gas failure occurs after successful ignition the appliance will attempt one re-ignition before going to
i.
lockout condition.
To shut down the appliance for short periods of time, switch off the electricity supply to the appliance.
j.
k. To shut down the appliance for longer periods of time, switch of the electricity supply to the appliance and
turn off the gas supply at the gas isolation valve. NOTE: The lighting and shutdown instructions are also
shown on a permanent label attached adjacent to the controls for the heater (see section 9.2).
-52-
Form #44201100
Oct 2019